@charset "UTF-8";
/* ==========================================================================
   ACJ — ARTVRE COLLECTIVE JAPAN
   Design tokens: stone-marble ground, bronze accent, layered gallery frames
   ========================================================================== */

:root{
  /* --- color: light (stone / marble gallery) --- */
  --paper:      #E9E4DA;   /* warm grey-stone ground */
  --paper-deep: #DDD6C8;   /* deeper stone, alternating sections */
  --panel:      #F5F2EB;   /* lightest panel / card ground */
  --ink:        #201F1C;   /* near-black warm ink */
  --ink-soft:   #6C665C;   /* soft warm grey, secondary text */
  --ink-faint:  #9A9284;   /* tertiary / meta text */
  --line:       #C7BEAC;   /* marble-grey hairline */
  --line-soft:  #D8D1C2;
  --gold:       #8C6A34;   /* bronze accent */
  --gold-ink:   #6E5227;   /* bronze, darker, for text-on-panel */
  --gold-soft:  rgba(140,106,52,0.12);
  --gold-line:  rgba(140,106,52,0.45);
  --shadow:     0 18px 40px -22px rgba(32,31,28,0.35);

  --font-display: 'Libre Caslon Text', 'Times New Roman', serif;
  --font-jp-display: 'Shippori Mincho', 'Hiragino Mincho ProN', serif;
  --font-body: 'Noto Serif JP', 'Libre Caslon Text', serif;
  --font-ui: 'Zen Kaku Gothic New', 'Hiragino Sans', sans-serif;

  --container: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:      #1B1A17;
    --paper-deep: #131211;
    --panel:      #232120;
    --ink:        #EDE8DE;
    --ink-soft:   #A79E8F;
    --ink-faint:  #776F62;
    --line:       #423D34;
    --line-soft:  #322E27;
    --gold:       #C7A059;
    --gold-ink:   #D8B36E;
    --gold-soft:  rgba(199,160,89,0.14);
    --gold-line:  rgba(199,160,89,0.4);
    --shadow:     0 18px 48px -20px rgba(0,0,0,0.6);
  }
}
:root[data-theme="dark"]{
  --paper:      #1B1A17;
  --paper-deep: #131211;
  --panel:      #232120;
  --ink:        #EDE8DE;
  --ink-soft:   #A79E8F;
  --ink-faint:  #776F62;
  --line:       #423D34;
  --line-soft:  #322E27;
  --gold:       #C7A059;
  --gold-ink:   #D8B36E;
  --gold-soft:  rgba(199,160,89,0.14);
  --gold-line:  rgba(199,160,89,0.4);
  --shadow:     0 18px 48px -20px rgba(0,0,0,0.6);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ text-wrap:balance; font-weight:400; margin:0; }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font:inherit; color:inherit; background:none; border:0; padding:0; cursor:pointer; }
:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; }

.container{
  max-width:var(--container);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

.eyebrow{
  font-family:var(--font-ui);
  font-size:0.72rem;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--gold-ink);
  display:flex;
  align-items:center;
  gap:0.6em;
}
.eyebrow::before{
  content:"";
  width:7px; height:7px;
  border:1px solid var(--gold-ink);
  transform:rotate(45deg);
  flex:none;
}

/* ---------- nav ---------- */
.site-nav{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
  transition:padding .25s ease;
}
.site-nav .container{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:22px; padding-bottom:22px;
  transition:padding .25s ease;
}
.site-nav.is-condensed .container{ padding-top:12px; padding-bottom:12px; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{
  width:16px; height:16px; flex:none;
  border:1px solid var(--gold-ink);
  transform:rotate(45deg);
}
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text .en{ font-family:var(--font-ui); font-size:0.86rem; letter-spacing:0.14em; }
.brand-text .jp{ font-family:var(--font-ui); font-size:0.68rem; letter-spacing:0.08em; color:var(--ink-soft); }

.nav-links{ display:flex; align-items:center; gap:clamp(18px,3vw,38px); }
.nav-links a{
  font-family:var(--font-ui); font-size:0.78rem; letter-spacing:0.12em;
  text-transform:uppercase; color:var(--ink-soft);
  position:relative; padding-bottom:4px;
  transition:color .2s ease;
}
.nav-links a:hover, .nav-links a.is-active{ color:var(--ink); }
.nav-links a.is-active::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:1px; background:var(--gold);
}
.nav-links a.ext{ display:inline-flex; align-items:center; gap:6px; }
.nav-links a.ext svg{ width:9px; height:9px; }
.nav-toggle{ display:none; }

@media (max-width: 760px){
  .nav-links{
    position:fixed; inset:64px 0 0 0; z-index:40;
    background:var(--paper); flex-direction:column; align-items:flex-start;
    justify-content:flex-start; gap:0; padding:8px var(--gutter) 40px;
    border-top:1px solid var(--line-soft);
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  .nav-links.is-open{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .nav-links a{ width:100%; padding:16px 0; border-bottom:1px solid var(--line-soft); }
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px; width:26px;
  }
  .nav-toggle span{ height:1px; background:var(--ink); width:100%; }
}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line-soft);
  padding:56px 0 40px;
  background:var(--paper-deep);
}
.footer-grid{
  display:flex; flex-wrap:wrap; gap:40px; justify-content:space-between; align-items:flex-start;
}
.footer-nav{ display:flex; flex-wrap:wrap; gap:12px 28px; }
.footer-nav a{
  font-family:var(--font-ui); font-size:0.78rem; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--ink-soft);
}
.footer-nav a:hover{ color:var(--ink); }
.footer-meta{
  font-family:var(--font-ui); font-size:0.72rem; color:var(--ink-faint); letter-spacing:0.04em;
  margin-top:28px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
}

/* ---------- photo frames ---------- */
.photo{
  display:inline-block; position:relative; overflow:hidden; background:var(--paper-deep);
  border:1px solid var(--line-soft); vertical-align:middle;
}
.photo img{
  width:100%; height:100%; object-fit:cover; object-position:center;
  filter:saturate(1.04) contrast(1.02);
  display:block;
}
.photo-sq{ aspect-ratio:1/1; }
.photo-land{ aspect-ratio:4/3; }
.photo-wide{ aspect-ratio:16/9; }
.photo-tall{ aspect-ratio:3/4; }
.photo-round{ border-radius:50%; }
.photo-cap{
  position:absolute; left:0; right:0; bottom:0;
  padding:6px 10px; font-family:var(--font-ui); font-size:0.64rem; letter-spacing:0.06em;
  color:#fff; background:linear-gradient(to top, rgba(0,0,0,.55), transparent);
}

.activity-card .thumb{ width:56px; height:56px; flex:none; border:1px solid var(--line-soft); }
.activity-card .thumb img{ width:100%; height:100%; object-fit:cover; }
.activity-card .card-top{ display:flex; align-items:center; gap:16px; }

.avatar-row{ display:flex; align-items:center; gap:14px; }
.avatar-row .photo{ width:52px; height:52px; flex:none; }

/* ---------- buttons / links ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-ui); font-size:0.78rem; letter-spacing:0.12em; text-transform:uppercase;
  padding:15px 26px; border:1px solid var(--ink); color:var(--ink);
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover{ background:var(--ink); color:var(--panel); }
.btn.btn-gold{ border-color:var(--gold-line); color:var(--gold-ink); }
.btn.btn-gold:hover{ background:var(--gold); border-color:var(--gold); color:var(--panel); }
.link-arrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-ui); font-size:0.76rem; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--gold-ink); border-bottom:1px solid var(--gold-line); padding-bottom:3px;
  transition:gap .2s ease, color .2s ease;
}
.link-arrow:hover{ gap:13px; color:var(--ink); }
.link-arrow svg{ width:12px; height:9px; flex:none; }

/* ---------- reveal on scroll ----------
   Default state is always visible (safe if JS never runs). JS opts an
   element INTO the hidden pre-reveal state only once it has confirmed
   the element starts off-screen, then removes it on intersection. */
.reveal{ opacity:1; transform:none; }
@media (prefers-reduced-motion: no-preference){
  .reveal.pre-reveal{ opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease; }
}

/* ---------- hero ---------- */
.hero{ padding:76px 0 88px; }
.hero-head{ max-width:760px; }
.hero-head .eyebrow{ margin-bottom:22px; }
.hero-title{
  font-family:var(--font-jp-display);
  font-size:clamp(2rem, 4.6vw, 3.4rem);
  line-height:1.45;
  color:var(--ink);
}
.hero-title em{ font-style:normal; color:var(--gold-ink); }
.hero-sub{
  margin-top:26px; max-width:60ch; color:var(--ink-soft); font-size:1rem; line-height:1.9;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-top:38px; }

/* ---------- generic section ---------- */
.section{ padding:88px 0; }
.section.alt{ background:var(--paper-deep); }
.section-head{ display:flex; justify-content:space-between; align-items:flex-end; gap:24px; flex-wrap:wrap; margin-bottom:52px; }
.section-title{
  font-family:var(--font-jp-display);
  font-size:clamp(1.5rem, 2.6vw, 2.1rem);
  margin-top:14px;
}
.section-title .sub{ display:block; font-family:var(--font-display); font-size:0.8rem; letter-spacing:0.2em; color:var(--ink-faint); margin-top:8px; text-transform:uppercase; }
.section-lede{ max-width:52ch; color:var(--ink-soft); }

/* ---------- layered frame diagram (ACJ structure) ---------- */
.layers{
  display:grid; grid-template-columns: 1.05fr 1fr; gap:56px; align-items:center;
}
@media (max-width: 880px){ .layers{ grid-template-columns:1fr; } }
.frame-stage{ position:relative; aspect-ratio:1/1; width:min(420px, 100%); margin:0 auto; }
.frame-ring{
  position:absolute; inset:0; border:1px solid var(--line);
}
.frame-ring::before,.frame-ring::after{ content:""; position:absolute; width:14px; height:14px; border-color:var(--gold-line); }
.frame-ring[data-corner="tl"]::before{ top:-1px; left:-1px; border-top:1px solid var(--gold); border-left:1px solid var(--gold); }
.frame-ring[data-i="0"]{ inset:0; }
.frame-ring[data-i="1"]{ inset:15%; }
.frame-ring[data-i="2"]{ inset:32%; }
.frame-ring .ring-label{
  position:absolute; top:-11px; left:14px; background:var(--paper);
  padding:0 8px; font-family:var(--font-ui); font-size:0.68rem; letter-spacing:0.16em; color:var(--ink-faint);
  text-transform:uppercase;
}
.frame-ring[data-i="2"] .ring-core{
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-jp-display); font-size:1rem; text-align:center; color:var(--gold-ink); padding:10px;
}

.layer-list{ display:flex; flex-direction:column; gap:0; }
.layer-item{ padding:26px 0; border-top:1px solid var(--line-soft); }
.layer-item:last-child{ border-bottom:1px solid var(--line-soft); }
.layer-item .name{
  display:flex; align-items:baseline; gap:12px; font-family:var(--font-display);
  font-size:1.15rem; color:var(--ink);
}
.layer-item .name .jp{ font-family:var(--font-jp-display); font-size:1.02rem; color:var(--ink-soft); }
.layer-item ul{ margin-top:14px; display:flex; flex-direction:column; gap:8px; }
.layer-item li{ font-size:0.92rem; color:var(--ink-soft); padding-left:1.2em; position:relative; }
.layer-item li::before{ content:"\2014"; position:absolute; left:0; color:var(--gold-line); }

/* ---------- activity grid ---------- */
.activity-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line-soft); border:1px solid var(--line-soft); }
@media (max-width:760px){ .activity-grid{ grid-template-columns:1fr; } }
.activity-card{ background:var(--panel); padding:40px clamp(24px,3vw,44px); display:flex; flex-direction:column; gap:16px; min-height:260px; }
.activity-card .tag{ font-family:var(--font-ui); font-size:0.7rem; letter-spacing:0.14em; color:var(--gold-ink); text-transform:uppercase; }
.activity-card h3{ font-family:var(--font-jp-display); font-size:1.15rem; }
.activity-card p{ color:var(--ink-soft); font-size:0.92rem; flex:1; }
.activity-card .meta{ font-family:var(--font-ui); font-size:0.72rem; color:var(--ink-faint); }

/* ---------- workshop teaser ---------- */
.teaser{
  display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center;
  border:1px solid var(--line-soft); padding:clamp(32px,5vw,64px);
}
@media (max-width:880px){ .teaser{ grid-template-columns:1fr; } }
.teaser-figure{ aspect-ratio:4/3; }
.teaser-figure span{
  font-family:var(--font-jp-display); font-size:1.4rem; color:#fff; text-align:center; padding:20px;
  position:absolute; left:16px; right:16px; bottom:16px; z-index:1;
  background:rgba(20,18,14,0.55); backdrop-filter:blur(2px);
}

/* ---------- accordion (workshop list) ---------- */
.ledger{ border-top:1px solid var(--line); }
.ledger-item{ border-bottom:1px solid var(--line); }
.ledger-trigger{
  width:100%; display:grid; grid-template-columns: 68px 1fr auto auto; align-items:center;
  gap:20px; padding:30px 4px; text-align:left; background:none;
}
.ledger-trigger:hover .ledger-title{ color:var(--gold-ink); }
.ledger-index{ width:68px; height:68px; }
.ledger-heading{ display:flex; flex-direction:column; gap:6px; }
.ledger-title{ font-family:var(--font-jp-display); font-size:1.15rem; transition:color .2s ease; }
.ledger-instructor{ font-family:var(--font-ui); font-size:0.76rem; color:var(--ink-soft); letter-spacing:0.04em; }
.ledger-price{ font-family:var(--font-ui); font-size:0.82rem; color:var(--ink-soft); white-space:nowrap; text-align:right; font-variant-numeric:tabular-nums; }
.ledger-plus{ position:relative; width:16px; height:16px; flex:none; }
.ledger-plus::before,.ledger-plus::after{ content:""; position:absolute; background:var(--gold-ink); transition:transform .25s ease; }
.ledger-plus::before{ left:0; top:50%; width:100%; height:1px; transform:translateY(-50%); }
.ledger-plus::after{ top:0; left:50%; width:1px; height:100%; transform:translateX(-50%); }
.ledger-item.is-open .ledger-plus::after{ transform:translateX(-50%) rotate(90deg); opacity:0; }

.ledger-panel{ overflow:hidden; max-height:0; transition:max-height .4s ease; }
.ledger-item.is-open .ledger-panel{ max-height:1400px; }
.ledger-panel-inner{ padding:0 4px 40px 84px; }
.ledger-body-grid{ display:grid; grid-template-columns:1.4fr 1fr; gap:40px; }
@media (max-width:760px){ .ledger-panel-inner{ padding-left:4px; } .ledger-body-grid{ grid-template-columns:1fr; } .ledger-trigger{ grid-template-columns:44px 1fr; row-gap:10px; } .ledger-index{ width:44px; height:44px; } .ledger-price{ grid-column:2; text-align:left; } }
.ledger-hero{ margin-bottom:22px; aspect-ratio:16/9; }
.ledger-panel-inner p + p{ margin-top:14px; }
.ledger-panel-inner .desc{ color:var(--ink-soft); font-size:0.94rem; }
.ledger-facts{ display:flex; flex-direction:column; gap:18px; }
.fact{ }
.fact .k{ font-family:var(--font-ui); font-size:0.68rem; letter-spacing:0.12em; text-transform:uppercase; color:var(--ink-faint); }
.fact .v{ font-family:var(--font-ui); font-size:0.88rem; color:var(--ink); margin-top:4px; }
.flow{ margin-top:20px; display:flex; flex-direction:column; gap:10px; }
.flow-step{ display:flex; gap:12px; font-size:0.88rem; color:var(--ink-soft); }
.flow-step b{ color:var(--gold-ink); font-family:var(--font-ui); font-weight:500; flex:none; }
.items-row{ display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.items-row span{ font-family:var(--font-ui); font-size:0.72rem; border:1px solid var(--line); padding:5px 10px; color:var(--ink-soft); }

/* ---------- exhibitions list ---------- */
.ex-hero{
  display:grid; grid-template-columns:1.1fr 1fr; border:1px solid var(--gold-line); background:var(--gold-soft);
  position:relative; overflow:hidden;
}
@media (max-width:800px){ .ex-hero{ grid-template-columns:1fr; } }
.ex-hero-media{ aspect-ratio:4/3; border:0; border-radius:0; }
@media (min-width:801px){ .ex-hero-media{ aspect-ratio:auto; height:100%; } }
.ex-hero-body{ padding:clamp(28px,4vw,52px); position:relative; }
.ex-hero .eyebrow{ margin-bottom:16px; }
.ex-hero h3{ font-family:var(--font-jp-display); font-size:clamp(1.4rem,3vw,2rem); }
.ex-hero .meta-row{ display:flex; gap:24px; flex-wrap:wrap; margin-top:18px; font-family:var(--font-ui); font-size:0.82rem; color:var(--ink-soft); }
.ex-hero .meta-row b{ color:var(--ink); font-weight:500; }
.ex-hero p.desc{ margin-top:20px; max-width:60ch; color:var(--ink-soft); }
.ex-hero .ext-tag{ position:absolute; top:clamp(20px,3vw,32px); right:clamp(20px,3vw,32px); font-family:var(--font-ui); font-size:0.68rem; letter-spacing:0.1em; color:var(--gold-ink); display:flex; align-items:center; gap:6px; text-transform:uppercase; }

.timeline{ border-top:1px solid var(--line); margin-top:64px; }
.tl-item{
  display:grid; grid-template-columns:88px 110px 1fr auto; gap:24px; align-items:center;
  padding:24px 4px; border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.tl-thumb{ width:88px; height:66px; }
.tl-item:hover{ background:var(--gold-soft); }
@media (max-width:700px){ .tl-item{ grid-template-columns:64px 1fr; gap:16px; } .tl-thumb{ width:64px; height:64px; grid-row:1 / 3; } .tl-arrow{ display:none; } }
.tl-date{ font-family:var(--font-ui); font-size:0.78rem; color:var(--ink-faint); letter-spacing:0.06em; font-variant-numeric:tabular-nums; }
.tl-main h4{ font-family:var(--font-jp-display); font-size:1.15rem; }
.tl-main .venue{ font-family:var(--font-ui); font-size:0.8rem; color:var(--ink-soft); margin-top:6px; }
.tl-arrow{ width:34px; height:34px; border:1px solid var(--line); display:flex; align-items:center; justify-content:center; flex:none; }
.tl-arrow svg{ width:12px; height:9px; }

/* ---------- detail page ---------- */
.detail-hero{ padding:60px 0 50px; border-bottom:1px solid var(--line-soft); }
.detail-hero-media{ margin-top:36px; aspect-ratio:21/9; }
@media (max-width:700px){ .detail-hero-media{ aspect-ratio:4/3; } }
.breadcrumb{ font-family:var(--font-ui); font-size:0.74rem; color:var(--ink-faint); letter-spacing:0.06em; display:flex; gap:8px; align-items:center; margin-bottom:24px; }
.breadcrumb a{ color:var(--ink-soft); }
.breadcrumb a:hover{ color:var(--gold-ink); }
.detail-title{ font-family:var(--font-jp-display); font-size:clamp(1.7rem,4vw,2.6rem); max-width:16ch; }
.detail-facts{ display:flex; flex-wrap:wrap; gap:32px 48px; margin-top:32px; }
.detail-facts .fact .v{ font-size:1rem; }

.prose{ max-width:66ch; color:var(--ink-soft); font-size:1rem; line-height:1.95; }
.prose p + p{ margin-top:20px; }
.prose strong{ color:var(--ink); font-weight:500; }

.roster-group{ margin-top:8px; }
.roster-group + .roster-group{ margin-top:56px; }
.roster-group h4{ font-family:var(--font-ui); font-size:0.76rem; letter-spacing:0.14em; text-transform:uppercase; color:var(--gold-ink); padding-bottom:14px; border-bottom:1px solid var(--line); margin-bottom:22px; }
.artist-card{ display:flex; justify-content:space-between; align-items:center; gap:16px; padding:14px 0; border-bottom:1px solid var(--line-soft); font-size:0.92rem; }
.artist-card .avatar{ width:44px; height:44px; flex:none; }
.artist-card .who{ color:var(--ink); }
.artist-card .who .country{ color:var(--ink-faint); font-size:0.82rem; }
.artist-card .works{ color:var(--ink-soft); text-align:right; font-variant-numeric:tabular-nums; white-space:nowrap; }
.name-cloud{ display:flex; flex-wrap:wrap; gap:10px 14px; }
.name-cloud span{ font-size:0.9rem; color:var(--ink-soft); }
.name-cloud span:not(:last-child)::after{ content:"\30FB"; color:var(--line); margin-left:14px; }

.artist-bio-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line-soft); border:1px solid var(--line-soft); margin-top:8px; }
@media (max-width:700px){ .artist-bio-grid{ grid-template-columns:1fr; } }
.artist-bio{ background:var(--panel); padding:30px clamp(22px,3vw,34px); }
.artist-bio .avatar{ width:52px; height:52px; margin-bottom:16px; }
.artist-bio .name{ font-family:var(--font-jp-display); font-size:1.02rem; margin-bottom:10px; }
.artist-bio .name .en{ font-family:var(--font-ui); font-size:0.74rem; color:var(--ink-faint); display:block; margin-top:3px; }
.artist-bio p{ color:var(--ink-soft); font-size:0.88rem; line-height:1.85; }

.detail-nav{ display:flex; justify-content:space-between; align-items:center; padding:44px 0; border-top:1px solid var(--line-soft); margin-top:20px; flex-wrap:wrap; gap:20px; }

.note-box{ border-left:2px solid var(--gold-line); padding:4px 0 4px 22px; margin-top:28px; }
.note-box p{ color:var(--ink-soft); font-size:0.88rem; }